# EdaSmart ESP32 Firmware

Kode ini adalah firmware untuk ESP32 yang mengendalikan:
- **Mesin Press** (naik/turun/tahan dengan limit switch & sonar HC-SR04)
- **Mesin Penggiling** (timer + RPM via Hall Effect sensor)
- **LCD 20×4 I2C** sebagai UI utama
- **PCF8574** untuk ekspansi I/O (tombol & limit switch)
- **MQTT over TLS** ke HiveMQ Cloud
- **OTA firmware update** via Access Point

---

## Struktur File

```
edasmart_esp32/
├── edasmart_esp32.ino   ← kode utama Arduino
├── config.h             ← konfigurasi MQTT & pin (edit di sini)
└── README.md
```

---

## Konfigurasi

Edit `config.h` sebelum upload:

```cpp
// WiFi (bisa diset lewat UI LCD langsung)
// MQTT
#define MQTT_SERVER "8dd0d24eadfb4eb0b1e6fd87628f0f4e.s1.eu.hivemq.cloud"
#define MQTT_PORT   8883
#define MQTT_USER   "Edasmart"
#define MQTT_PASS   "KentangBalado1"
```

---

## Topik MQTT

### Publish (ESP32 → Backend)

| Topic                    | Nilai         | Keterangan                     |
|--------------------------|---------------|--------------------------------|
| `edasmart/press/status`  | `ON` / `OFF`  | Status mesin press             |
| `edasmart/press/phase`   | `TURUN` dst   | Fase gerakan press             |
| `edasmart/press/sisa`    | integer detik | Sisa waktu tahan               |
| `edasmart/giling/status` | `ON` / `OFF`  | Status mesin penggiling        |
| `edasmart/giling/rpm`    | integer       | RPM penggiling (Hall sensor)   |
| `edasmart/giling/sisa`   | integer detik | Sisa waktu penggiling          |
| `edasmart/estop`         | `TRIGGERED` / `RELEASED` | Status emergency stop |
| `edasmart/device`        | `ONLINE`      | Device menyala (retained)      |

### Subscribe (Backend → ESP32)

| Topic                  | Nilai  | Keterangan              |
|------------------------|--------|-------------------------|
| `edasmart/cmd/press`   | `STOP` | Hentikan mesin press    |
| `edasmart/cmd/giling`  | `STOP` | Hentikan mesin penggiling |

---

## Library Arduino yang Dibutuhkan

Install via **Arduino Library Manager**:

- `PubSubClient` by Nick O'Leary
- `LiquidCrystal I2C` by Frank de Brabander
- `PCF8574` by Rob Tillaart
- `WiFi` (built-in ESP32)
- `Preferences` (built-in ESP32)
- `WebServer` (built-in ESP32)
- `Update` (built-in ESP32)

---

## Pin Mapping

| Fungsi           | Pin ESP32 |
|------------------|-----------|
| SDA (I2C)        | 21        |
| SCL (I2C)        | 22        |
| ENA (Motor A PWM)| 32        |
| ENB (Motor B PWM)| 33        |
| IN1              | 25        |
| IN2              | 26        |
| IN3              | 27        |
| IN4              | 14        |
| RELAY_PRESS      | 16        |
| RELAY_PENGGILING | 17        |
| BUZZER           | 23        |
| LED BUILTIN      | 2         |
| HALL SENSOR      | 34        |
| TRIG HC-SR04     | 18        |
| ECHO HC-SR04     | 19        |

**PCF8574 (I2C, addr 0x20):**

| Fungsi       | Pin PCF |
|--------------|---------|
| BTN_OK       | P1      |
| BTN_BACK     | P0      |
| BTN_UP       | P3      |
| BTN_DOWN     | P2      |
| BTN_ESTOP    | P6 (NC) |
| BTN_LS_ATAS  | P4 (NC) |
| BTN_LS_BAWAH | P5 (NC) |

---

## Upload

1. Buka `edasmart_esp32.ino` di Arduino IDE
2. Board: `ESP32 Dev Module`
3. Upload speed: `115200`
4. Setelah upload, set WiFi lewat menu **Setting → WiFi → Scan WiFi** di LCD